Hello,
I recently made a cutting board using osage orange and now find that when I wipe down the board with a damp rag, there is a yellow residue left behind on the rage. It looks very similar to the sawdust, but when it is dry and I wipe it with a dry cloth, there's nothing. I know the Osage Orange sawdust can be used as a dye, so is the wood saturated with an oil that is coming out when it gets wet on the surface? Or is it really tiny particles of sawdust/wood that are coming off?